Conduit.



No. 805,665. PATENTED NOV. 28, 1905.

D. E. REAGAN. CONDUIT.

APPLICATION FILED MAR.10, 1905.

I Imm.. NNUU 23 i Y immuni um DANIEL E. REAGAN, OF TERRE HAUTE, INDIANA.

CONDUIT.

Specification of Letters Patent.

Patented Nov. 28, 1905.

Application iiled March 10, 1905. Serial No. 249,362.

*k To @ZZ whom, zt 77mg/ concern:

Be it known that I, DANIEL E. REAGAN, a citizen of the United States, residing at Terre Haute, in the county of Vigo and State of Indiana,`have invented certain new and useful Improvements in Conduite, of which the following is a specification.

In electrical underground construction the conduits for the cables or wires are commonly made of sections formed in a similar manner as tiling, but usually with a plurality of openings. It is important that these sections should register with substantial exactness when laid, and it has been customary to unite them by means of dowel-pins. Such pins and the openings for receiving them, as heretofore made, have been open to a variety of objections. Some such pins have embodied a central flange or collar as the means of holding the pins from passing entirely into the holes in one section. This has had the eect to separate the ends of the conduit-sections somewhat, which is of course objectionable, as such conduit-sections when assembled should be in close contact, so as to make the conduit as a whole continuous. Vith other varieties the openings to receive the pins have been of two sizes-that is, of one size at one end of the section and of another size at the other. This has required that the sections should always be laid in a particular waythat is, with an end of one having the larger-size opening and an end of the adjacent one having the smallersize opening together.

It is the object of my invention to provide a form of dowel-pin and opening therefor which will permit the sections to be laid closely together and at the same time permit them to be laid indiscriminately, so that they will always fit together whichever ends happen to come next to each other.

Said invention consists, therefore, in forming lateral extensions or wing-openings in the ends of( the dowel-pin holes or openings and providing the pins with central iianges or wings adapted to enter said lateral extensions.

Referring to the accompanying drawings, which are made a part hereof, and on which similar reference characters indicate similar parts, Figure l is a perspective view of a section of conduit of the kind to which my invention is commonly applied; Fig. 2, a longitudinal vertical section, on an enlarged scale, of a portion of two adjacent conduit-sections when brought together and connected by my improved uniting means, as seen when looking in the direction indicated by the arrows from the dotted line 2 2 in Fig. l; Fig. 3, a transverse sectional view at the point indicated by the dotted line 3 8 in Fig. l on a still further enlarged scale; Fig. 4, a detail longitudinal sectional view at the point indicated by the dotted line 4 4 in Fig. 3, and Fig. 5 a perspective view of one of my improved dowelpins separately.

The conduit-sections 21, as heretofore indicated, usually contain a plurality of openings 22 for the wires or cables. At the intersections of the partitions dividing these openings are smaller openings or perforations 23 to receive the dowel-pins. These openings in my improved construction are of uniform size throughout their length and are thus capable of being formed at the same time the regular conduit openings are formed. I, however, after the sections have been molded and before they are baked insert a iiat instrument, preferably centrally of and extending directly across said openings, and thus form wing-recesses 24, extending out thereform. These wing-recesses are preferably suiiciently deep to receive the wings of the central part of the dowel-pin when said pin is inserted in the openings in question. While I preferably make said recesses deep enough to receive the entire wings of' the dowel-pins, I make them in both ends of each of the sections in order that the pins may be inserted indiiferently in either end of either section and so that the sections may be brought together without regard to whether one end or the other is brought against the section previously laid.

The dowel-pins 3l are preferably ordinary plain round dowel-pins and of a size suitable to somewhat loosely enter into the longitudinal round openings provided to receive them in the conduit-sections, except that at the central portion wings 32 are provided. I have shown and prefer to use two such wings on each pin; but I do not limit means to any particularnumber. These wings and the lateral openings provided to receive them are preferably fairly close fitting so far as the thickness of the wings and the corresponding diameter of said openings is concerned. The fit otherwise is ordinarily quite loose; but with these particular dimensions formed substantially equal the pins when inserted are held substantially in line with the general direction in which the conduit is being laid, so that no trouble is experienced when bringing the sections together to secure registry of IOO IIO

the parts or to insure that the pins shall without trouble enter the holes in the adjacent sections. The wings on the pins also serve to stop the pins from entering said holes too far, and thus becoming ineffective'.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination, with conduit-sections provided with longitudinal dowel-pin perforations having wing-like extensions, of dowelpins provided with corresponding wings and adapted to enter said perforations and unite the ends of the sections.

2. The combination of conduit-sections having longitudinal dowel-pin perforations and wing-like recesses provided at the ends of said perforations, of dowel-pins adapted to be inserted in said perforatious and having Wings whose thickness is substantially equal to the corresponding dimension of the recesses, whereby said wings are adapted to support said pins in a substantially straight and true position, substantially as and for the purpose set forth.

3. The combination of conduit-sections having longitudinal openings for the reception of the devices to be carried thereby and also smaller longitudinal perforations parallel therewith for the reception of dowel-pins, said last-named perforations having wing-like recesses extending laterally therefrom, and dow`el-pins the ends whereof are adapted to extend into the corresponding perforations in adjacent ends of the conduit-sections and the wings whereon are adapted to enter and be received by said wing-like recesses, all substantially as shown and described.

In witness whereof I have hereunto set my hand and seal, at Brazil, Indiana, this 6th day of March, A. D. 1905.

DANIEL E. REAGAN. 

